It is discontinued, but it's been working fine for me - so do as you wish.
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Sorry if this is wrong, but if it doesn't let you download the whole folder - there's 3 files. Make a new folder called IlyaVoiceV2 - inside make 1 called lua,inside make 2 more, 1 called autorun, another called vgui - put voice_config and voice_main in the 'autorun' folder, and visualiser in the 'vgui' folder.